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Honda 5 hp (pressure washer) issue

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Forum topic by Kudzupatch posted 06-22-2021 05:20 PM 340 views 0 times favorited 9 replies Add to Favorites Watch
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Kudzupatch

246 posts in 2364 days


06-22-2021 05:20 PM

Just an FYI in case someone else runs into this.

5 hp Honda with a pressure washer pump, worked great.

This year it would fire right up. Run great. Start spraying/putting a load on the motor and would run a couple of minutes and die. Fire right back up, run fine. Start spraying and it would stumble and most ties die. Very annoying and nothing could be found wrong with it.

I hate working on small engines anyway and when I couldn’t find anything I took it my guy and he is stumped. Blames the pump and I tended to agree but it is new pump.

LOTS of digging on the internet and found a small forum and several people said replace the spark plug. It looks fine but I am desperate and plugs are cheap. To my amazement it works great now.

Apparently this is an issue with the smaller Honda engines and not many know about the plug being the culprit.

So, just an FYI if have small Honda motor.

-- Jeff Horton * Kudzu Craft skin boats* www.kudzucraft.com


9 replies so far

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Kelly

3636 posts in 4100 days


#1 posted 06-23-2021 02:56 AM

Good tip. Would never have guessed.

The crap they pass for gas (added alcohol) is my whine. My 12 horse would sputter and pop, so I dropped a teaspoon of lacquer thinner in the gas and it straightened out after about twenty minutes.

Though I always run my gas tools out of gas, rather than just shutting them down, the gas sold now days leaves coatings in the carb. The lacquer thinner dissolves it.

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CWWoodworking

2021 posts in 1335 days


#2 posted 06-23-2021 03:12 AM

I despise small gas motors. I switched to electric pressure washer. Not as much giddy up but still gets the job done and I don’t have to fix it every year.

I switched to a battery weed eater to. It is absolutely the best. I now have 400$ worth of echo/Stihl collecting dust while I use my 69$ Ryobi.

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MrRon

6089 posts in 4399 days


#3 posted 06-23-2021 04:27 AM

Battery operated tools are the future. They may cost a bit more, but battery operated tools eliminate the problems associated with gas operated tools. I would like to have the battery operated, zero turn mower, but at $5000+, is a bit steep for a homeowner.

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Kelly

3636 posts in 4100 days


#4 posted 06-23-2021 07:44 AM

Not anytime soon for things like my 12 horse. It makes every electric out there look like a toy, and compared to many, mine is a toy.

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Kudzupatch

246 posts in 2364 days


#5 posted 06-23-2021 12:37 PM

We were stumped because it had all the signs of fuel starvation. I was assuming the fuel pump was going bad. I had taken the carb apart and it was clean as a new one. As I said, even the guy who does this for a living was stumped on that one.

So we had to assume somehow the pump was loading the motor. Lot of posts on bad loader valves but adjusting it to the point it had no pressure made no difference. NOTHING indicated an ignition issue.

-- Jeff Horton * Kudzu Craft skin boats* www.kudzucraft.com

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ecochris

1 post in 27 days


#6 posted 06-28-2021 07:52 PM

Afe you sure its the motor and not the water supply not keeping up with the pumping rate?

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Kudzupatch

246 posts in 2364 days


#7 posted 06-28-2021 09:55 PM



Afe you sure its the motor and not the water supply not keeping up with the pumping rate?

- ecochris

New plug and it runs perfect. So yes I am sure.

-- Jeff Horton * Kudzu Craft skin boats* www.kudzucraft.com

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MrRon

6089 posts in 4399 days


#8 posted 06-30-2021 12:00 AM

I have used gas powered chain saws and have never had a problem with the engine stopping or in re-starting. Gas powered chain saws are reliable.

View ocean's profile

ocean

232 posts in 1989 days


#9 posted 06-30-2021 12:28 AM

You might try REC90 gas (No alcohol). It is not available everywhere but I happen to live in the FL Keys where boating/fishing is everything. Small engines tend to have plastic parts in the carburetor and the standard gas will in a short time warp the plastic parts or gum it up. Try using REC90 or add a fuel additive (2nd choice) to prevent water absorption from the air. This is a good point about all small engines! Second method is to drain your fuel tank and run the engine dry, after each use. A real pain in the you know what, but it works.

-- Bob, FL Keys

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